Esri, the market leader in GIS technology, here presents a useful introduction.
The Esri Education Team has gathered many useful tutorials for ArcGIS Online and ArcGIS Pro. You can access most of these resources by logging in with your WSU ArcGIS account.
Esri provides many different training opportunities for learning their products.
Esri here offers several free training modules for learning ArcGIS software.
Dr. Joseph Kerski, a geographer and educator at Esri, posts many educational videos on his Our Earth YouTube channel.
Dr. Kerski provides a useful introduction to ArcGIS StoryMaps, an application that enables one to build an online presentation including text, photographs, digital maps, and other media.